Jump to content
Ultimate Subaru Message Board

Sucking sound coming from behind carb -vac leak or carb itself?


211
 Share

Recommended Posts

So on my journey to solving some tranny/power issues, I noticed a pretty loud "sucking" noise coming from behind the carb. It sounds like a bad vaccuum leak but when I sprayed some carb cleaner around there there wasn't any idle change. I didn't spray a whole lot because I got spooked when a small flair-up ignited on the heater return line :eek:.

It's hard to tell where exactly it's coming from- it's definately behind the carb between the air cleaner and the manifold, so I'm wondering if it's the actual carb I'm hearing...

...is it really that loud!?!

Link to comment
Share on other sites

I have the same thing, I have found that it is a little diaphram thingy no the back of the carb. I cant remember what I did, but thats prolly what your hearing.

I know the diaphram you're refering to. So that's normal vacuum noise coming from there?

Link to comment
Share on other sites

... it's definately behind the carb between the air cleaner and the manifold, so I'm wondering if it's the actual carb I'm hearing...

 

Have you Checked the Positive Crancase Ventilation Valve (P.C.V.)? is in the Path that you mentioned above... Maybe it has a Worn / Weak Hose...

I Suggest to Check the Hoses and the Carb´s Adjustment to its Base.

Good Luck! :burnout:

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...